Adaptive spatial alignment and strategic perceptual-motor control

Author(s): Wallace, B.

Journal/Book: J Exp Psychol-Hum Percep Perf. 1996; 22: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 379-394.

Abstract: When starting limb and target locations were simultaneously visible in a visuomotor task, performance during prism exposure was nearly perfect, but aftereffects were absent. When starting limb location was not visible, accurate exposure performance was slow to develop, but aftereffects were substantial. Adaptive spatial alignment of sensorimotor spaces and strategic perceptual-motor control to coordinate sensorimotor systems are distinct processes. However, realignment is dependent on whether the exposure task evokes control strategies that enable detection of misalignment. If the task can be performed solely by coding the visible difference between limb and target locations, misalignment detection is disabled. If movement is initiated by target location and then the limb is controlled by the visible difference between target and limb, the discordance between initialized and terminal locations enables misalignment detection and realignment.

Note: Review GM Redding, Illinois State Univ, Dept Psychol, Campus Box 4620, Normal, IL 61790 USA

Keyword(s): ARM MOVEMENTS; PRISM ADAPTATION; REACHING MOVEMENTS; VISUAL FEEDBACK; CELL DISCHARGE; DIRECTION; HAND; SPECIFICATION; COORDINATION; ACCURACY

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